Chapter 1 Introduction
6253M Mainboard
1-4 Running 100 MHz CPU Bus (with JP11)
The mainboard provides
Jumper 11
that allows you to set your CPU host clock and
perform CPU overclock function. There are two ways to set CPU host clock at
‘closed’ and ‘open’. When setting ‘closed’, the system will automatically detect the
CPU host clock, for instance 66MHz and 100MHz. Another way is to set
Jumper 11
at ‘open’ for 66MHz CPU overclock to 100MHz.
We recommend that users should use Intel Pentium
II/III 100 MHz CPU, running at
350, 400, 450 and 500MHz internal clock speed. Moreover, the SDRAM memory
module must be 8 nano-second (Maximum Frequency 125 MHz) speed of memory –
die or less. However, based on Intel’s design, we don’t recommend users to run over
100MHz CPU host bus.
Please note that the default setting of Jumper 11 is ‘closed’.
Jumper 11
BASE CLK
Closed
Auto (default)/PIII 550MHz up
Open
Overclock (66MHz
100MHz)
(a) Pin Closed (b)
Pin Open
Slot 1
JP11
If you would like to run over 100MHz CPU host bus, like 112 and 124MHz,
please set “CPU Clock Frequency” in “CHIPSET FEATURES SETUP” from
the BIOS setup screen. If the system can’t boot up with the clock frequency
that you set to, you can clear the set frequency by pressing the ‘Insert” key on
keyboard. After restarting the system, you have the system operating at the
default frequency.
